CUMMINS 4955523 OEM UPPER ENGINE GASKET SET – ISB 6.7L (2011–2012)

CUMMINS 4955523 upper engine gasket set, OEM Cummins 6.7L ISB 2011 2012 head gasket kit, Ram 2500 Ram 3500 6.7 Cummins top end rebuild, EPA07 ISB/QSB6.7 upper gasket set, genuine Cummins engine gaskets, 6.7 liter Cummins head set When you are tearing into a 2011–2012 6.7L Cummins for a head job or top-end refresh, the CUMMINS 4955523 OEM UPPER ENGINE GASKET SET gives you the complete, genuine Cummins sealing solution you need — in one box — for ISB 6.7L Ram and EPA07 QSB6.7 applications.

Why Choose Genuine Cummins 4955523?

• Engineered by Cummins for EPA07 6.7L ISB/QSB platforms to restore OE sealing and compression.
• Includes critical upper-engine gaskets and seals for head service, intake/exhaust, EGR and top-end hardware.
• OE materials, fire-ring design and thickness to match factory performance and durability.
• Perfect match for 2011–2012 Ram 2500/3500 6.7L ISB trucks when verified by ESN/VIN.
• One-kit convenience to cut downtime, reduce comebacks and avoid mismatched aftermarket gaskets.

Fitment – 6.7L Cummins ISB (2011–2012) & QSB6.7

• Engine: 6.7L ISB (24V common-rail) / QSB6.7 (EPA07 industrial)
• Truck Applications: 2011–2012 Ram 2500 & Ram 3500 with 6.7L ISB (verify by ESN/VIN)
• Typical Industrial Use: QSB6.7 with EGR on EPA07 off-highway equipment (confirm by ESN)
• Position: Upper engine / head & top-end gasket set (pair with lower set for full reseal)
• Quantity: 1 kit required per engine

What’s Included (Typical Kit Contents)

Kit contents can vary slightly by Cummins revision, but the 4955523 upper engine gasket set is typically configured to support a full top-end service. You can expect coverage for:

• Multi-layer steel head gasket (correct thickness for 6.7L ISB/QSB specification)
• Intake and exhaust manifold gaskets
• EGR and related cooler/intake gaskets, where equipped
• Turbocharger mounting and oil feed/return sealing gaskets (as applicable)
• Valve stem seals
• Injector and high-pressure connector sealing washers/O-rings
• Miscellaneous upper-engine O-rings, seals and washers required for top-end reassembly

Always review the current Cummins kit contents before teardown so you know exactly what is covered in your specific 4955523 package.

Cross-Reference & Related Cummins Parts (CPP Diesel)

Use these genuine Cummins parts from CPP Diesel when you are planning a full 6.7L ISB reseal or when you need coverage for other model years:

• Upper Engine Gasket Kit – 6.7L ISB (2007.5–2018): CUMMINS 4955354 OEM UPPER ENGINE GASKET KIT – ISB 6.7L (2007.5–2018)
• Upper Engine Gasket Kit – 5.9L ISB (2003–2007): CUMMINS 4089819 OEM UPPER ENGINE GASKET KIT – ISB 5.9L (2003–2007)
• Upper Engine Gasket Kit – 6.7L ISB (2013–2018): CUMMINS 4376090 OEM UPPER ENGINE GASKET KIT – ISB 6.7L (2013–2018)
• Engine Oil Cooler – 6.7L ISB (2007.5–2024): CUMMINS 3975818 OEM ENGINE OIL COOLER – ISB 6.7L (2007.5–2024)

Installation Notes

• Confirm engine serial number (ESN) and emissions family to ensure 4955523 is correct for your ESN.
• Carefully inspect block and head deck surfaces; follow Cummins flatness and surface-finish specs.
• Match head gasket thickness to OE spec; never mix-match unknown gasket thicknesses.
• Use factory torque + angle procedures for head bolts or studs and replace all one-time-use fasteners.
• Flush coolant and change engine oil/filter after reassembly and initial heat cycles.

Specifications for cummins 4955523

FAQ

This upper engine gasket set is engineered for EPA07 6.7L ISB applications and is commonly used on 2011–2012 Ram 2500/3500 6.7L trucks. Always confirm by engine serial number (ESN) and VIN to make sure 4955523 is correct for your exact build and emissions calibration.

4955523 is designed as an upper engine / head and top-end gasket kit and includes the critical gaskets and seals for head service and upper components. It does not replace every seal on the engine, and some items (such as certain valve cover harness gaskets or lower-end gaskets) may be separate part numbers. For a full reseal, pair this kit with the correct Cummins lower engine gasket set for your ESN.

Catalogs differ by revision; some configurations include valve cover sealing components, while others do not. To avoid downtime, we recommend planning for a separate valve cover gasket or harness gasket and confirming the current Cummins contents list for your specific 4955523 kit before disassembly.

4955523 is targeted at EPA07 6.7L ISB/QSB engines and aligns with 2011–2012 Ram 6.7L truck coverage. Other years often use different upper engine sets (for example, 4955354 for many 2007.5–2018 6.7L applications or 4376090 for 2013–2018 trucks). Always verify the correct kit for your ESN instead of assuming interchange.

Along with the 4955523 upper engine gasket set, many shops upgrade to new head bolts or studs, replace injector sealing washers and critical coolant hoses, and service the engine oil cooler. Pairing this kit with lower engine gaskets and fresh fluids helps protect your investment and reduce the chance of repeat repairs.